Thanks for posting. It sounds like a logical issue with the drive from abrupt disconnection. There are a couple of third party software options you can use to get to the data. One is disk warrior which can usually repair the partition table where disk utility cannot. If not can copy files off. The other is data rescue 3 which can bypasses the partition table to copy data off. For data rescue 3 there is a free trial, there is not for disk warrior. One of there should allow you to get the data off.